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Related Concept Videos

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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Related Experiment Video

Updated: Jun 23, 2026

Combining Optogenetics with Artificial microRNAs to Characterize the Effects of Gene Knockdown on Presynaptic Function within Intact Neuronal Circuits
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Transcriptome-based insights into gene networks controlling myopia prevention.

Cindy Karouta1, Robert Kucharski1,2, Kristine Hardy1

  • 1Centre for Research in Therapeutic Solutions, Biomedical Sciences, Faculty of Science and Technology, University of Canberra, Canberra, ACT, Australia.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|August 18, 2021
PubMed
Summary

Researchers identified a universal set of retinal molecular changes that inhibit eye growth, regardless of the myopia treatment used. These changes, involving transcription factors like EGR1, are crucial for regulating ocular development and offer new therapeutic targets for myopia.

Keywords:
RNA sequencinggene expressionmyopiaretinatranscriptome

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Area of Science:

  • Ophthalmology
  • Molecular Biology
  • Genetics

Background:

  • Myopia (short-sightedness) is a global epidemic driven by excessive eye elongation.
  • Existing myopia treatments in animal models reduce ocular growth through diverse mechanisms.

Purpose of the Study:

  • To identify a common set of retinal molecular changes underlying myopia inhibition across various treatments.
  • To investigate the role of specific transcription factors, like EGR1, in regulating ocular growth.

Main Methods:

  • RNA sequencing (RNA-seq) was used to analyze retinal transcriptome profiles in chicks treated with five different myopia-inhibiting methods.
  • Comparative analysis was performed with human linkage and Genome-Wide Association Studies (GWAS) data for refractive error.

Main Results:

  • A significant overlap in retinal transcriptome profiles was observed across all five myopia inhibition methods.
  • Cell signaling and circadian entrainment pathways were enriched, with transcription factors being a major functional group.
  • The transcription factor EGR1 showed a universal response and its downstream targets constituted a large part of the observed retinal response.

Conclusions:

  • A conserved retinal molecular network, involving EGR1, is fundamental to regulating ocular growth and inhibiting myopia.
  • These findings validate the chicken model for myopia research and suggest novel therapeutic targets for human myopia.